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Surface chemistry of Ti6Al4V components fabricated using selective laser melting for biomedical applications

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journal contribution
posted on 12.08.2016, 12:56 by Jayasheelan Vaithilingam, Elisabetta Prina, Ruth Goodridge, Richard J.M. Hague, Steve Edmondson, Felicity R.A.J. Rose, Steven ChristieSteven Christie
© 2016 The Authors. Published by Elsevier B.V.Selective laser melting (SLM) has previously been shown to be a viable method for fabricating biomedical implants; however, the surface chemistry of SLM fabricated parts is poorly understood. In this study, X-ray photoelectron spectroscopy (XPS) was used to determine the surface chemistries of (a) SLM as-fabricated (SLM-AF) Ti6Al4V and (b) SLM fabricated and mechanically polished (SLM-MP) Ti6Al4V samples and compared with (c) traditionally manufactured (forged) and mechanically polished Ti6Al4V samples. The SLM-AF surface was observed to be porous with an average surface roughness (Ra) of 17.6 ± 3.7 μm. The surface chemistry of the SLM-AF was significantly different to the FGD-MP surface with respect to elemental distribution and their existence on the outermost surface. Sintered particles on the SLM-AF surface were observed to affect depth profiling of the sample due to a shadowing effect during argon ion sputtering. Surface heterogeneity was observed for all three surfaces; however, vanadium was witnessed only on the mechanically polished (SLM-MP and FGD-MP) surfaces. The direct and indirect 3T3 cell cytotoxicity studies revealed that the cells were viable on the SLM fabricated Ti6Al4V parts. The varied surface chemistry of the SLM-AF and SLM-MP did not influence the cell behaviour.

Funding

This work was supported by the Engineering and Physical Sciences Research Council (EPSRC; UK) under grant EP/I033335/2 and the Medical Research Council (MRC) -EPSRC Centre for Doctoral Training (CDT) in Regenerative Medicine (EP/L015072/1)

History

School

  • Science

Department

  • Chemistry

Published in

Materials Science and Engineering C

Volume

67

Pages

294 - 303

Citation

VAITHILINGAM, J. ...et al., 2016. Surface chemistry of Ti6Al4V components fabricated using selective laser melting for biomedical applications. Materials Science and Engineering C, 67, pp. 294-303.

Publisher

© The Authors. Published by Elsevier

Version

VoR (Version of Record)

Publisher statement

This work is made available according to the conditions of the Creative Commons Attribution 4.0 International (CC BY 4.0) licence. Full details of this licence are available at: http://creativecommons.org/licenses/ by/4.0/

Acceptance date

12/05/2016

Publication date

2016

Notes

This is an Open Access Article. It is published by Elsevier under the Creative Commons Attribution 4.0 Unported Licence (CC BY). Full details of this licence are available at: http://creativecommons.org/licenses/by/4.0/

ISSN

0928-4931

Language

en